The H5N1 avian influenza virus is mutating to evade immune defenses in mammals following prior infection or vaccination.

The detection of bird flu in a sheep is another sign that the H5N1 virus is adapting to hop to new hosts ...

H5N1 influenza is evolving rapidly, weakening the effectiveness of existing antibodies and increasing its potential threat to ...

The team tested the device using aerosolized inactivated viruses to evaluate the performance of the sensor unit. The machine sampled the air continuously, providing a readout every 5 min, and ...

Picture hemagglutinin's shape as a submicroscopic mushroom ... protected from infection following exposure to H3N2 seasonal flu virus. The reason Mantus and her team—and essentially all others ...

But if the virus gains certain mutations, scientists fear it could trigger another pandemic. This prospect has propelled research into whether our defenses built up from past flu seasons can offer ...